Event: Division 4

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Opponent Rating Result
Martin Gill 119 ½ - ½
David J Barker 110 1 - 0
Joseph P Alcock 95 0 - 1
Ernest Wilkinson 101 1 - 0
Paul Shelley 92 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

183 = (517 + 400 * (2 - 1)) / 5)

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